Two thirds (2/3) of all gun related deaths in the United States are suicides. That's roughly 20,000 gun related suicides annually. The odds of being killed in a mass public shooting are about 1 in 7,800,000[1]. Compared to your chances of being struck by lighting (about 1 in 1,000,000)[2], this is exceedingly rare.
Legal gun ownership is not our problem. Suicide clearly is, and we cannot be so naive to believe reducing the number of guns in the country will have any real effect on reducing the number of suicides.
Sure, we'll see a decrease in gun related suicides... but the suicides will still occur, just with an alternate method.
These people need help, yet we're ignoring them because it's far easier to get riled up about people owning guns than it is to care about some faceless person committing suicide.
[1] http://www.psychlawjournal.com/2013/01/school-shootings-what...
[2] http://discovertheodds.com/what-are-the-odds-of-being-struck...